A working directory of the world's law firms, global legal networks, professional bodies, and standard-setters — plus the AI capital now circling the profession from the outside. There is no "Big Four" of law; ask ten lawyers for the top seven firms and you'll get ten different lists. This is a first pass, built to be appended — not a finished census.
Thrive Holdings could buy accounting firms outright because the profession's independence rules let non-attest work sit in a separately owned entity. Law has no such workaround in most of the world: ABA Model Rule 5.4 and its equivalents ban non-lawyer ownership of law firms almost everywhere. So the capital chasing legal services has taken a different shape — not acquisition, but an arms race in AI tooling sold to firms rather than ownership of them. Harvey (backed by the OpenAI Startup Fund and Sequoia) hit an $11 billion valuation in March 2026 and was reportedly in talks for $15.5 billion by August; its Stockholm rival Legora went from $5.6 billion to talks of $10 billion+ in the same stretch. Two companies, one category, sixteen billion dollars of combined value — in a market that barely existed five years ago.
The one real crack in the ownership wall is Arizona's Alternative Business Structure regime — and tellingly, the most eye-catching license issued under it didn't go to a startup. It went to KPMG, approved to operate KPMG Law as a non-lawyer-owned entity. If that model spreads, the accounting-style roll-up becomes possible in law too. For now, it hasn't — which is exactly why this directory tracks AI platforms and ownership platforms as two separate, much smaller lists than the ones for accounting.
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